6441681941 has 4 divisors (see below), whose sum is σ = 6464444352. Its totient is φ = 6418919532.

The previous prime is 6441681899. The next prime is 6441681947. The reversal of 6441681941 is 1491861446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1491861446 = 2 ⋅745930723.

It is a cyclic number.

It is not a de Polignac number, because 6441681941 - 2¹⁴ = 6441665557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6441681892 and 6441681901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441681947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11380781 + ... + 11381346.

It is an arithmetic number, because the mean of its divisors is an integer number (1616111088).

Almost surely, 2^6441681941 is an apocalyptic number.

It is an amenable number.

6441681941 is a deficient number, since it is larger than the sum of its proper divisors (22762411).

6441681941 is a wasteful number, since it uses less digits than its factorization.

6441681941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22762410.

The product of its digits is 165888, while the sum is 44.

The square root of 6441681941 is about 80260.0893408424. The cubic root of 6441681941 is about 1860.6574487246.

The spelling of 6441681941 in words is "six billion, four hundred forty-one million, six hundred eighty-one thousand, nine hundred forty-one".